The newfound star is not only one of the oldest stars in the universe, but also one of the most metal-poor stars known. An artist’s concept of a small red dwarf star is shown above.

Small stars make good candidates in the search for exoplanets, von Boetticher said. Red dwarfs, smaller and cooler than stars like our sun, are the most common type of star in the universe.

An artist's conception depicts the exoplanet MOA-2007-BLG-192Lb orbiting its host star. The star, MOA-2007-BLG-192L, is a leading candidate for the smallest known hydrogen-burning main-sequence ...

One contender for the smallest thing in the universe is the singularity at the center of a black hole. (Shown here, an artist's drawing of a black hole pulling gas away from a companion star.

Astronomers have discovered a mysterious object in space that may be the smallest galaxy in the Universe, or the oldest star cluster in the Milky Way.

Some of the biggest, most intense regions of star formation are found in the smallest of galaxies, and scientists believe this is because stars reaching the ends of their lives in the so-called ...

Some of the biggest, most intense regions of star formation are found in the smallest of galaxies, and scientists believe this is because stars reaching the ends of their lives in the so-called ...

The smallest star is about the same size as Jupiter, weirdly. The Universe is an odd place to live. Diagram by NASA/JPL-Caltech/UCB ...

The largest structures in the Universe have five times as much dark matter as normal matter. But the smallest ones? The number rises into the thousands.

In an excerpt from the introduction of her new book, 'The Smallest Lights in the Universe,' astronomer Sara Seager see life through planetary science.